993944387 has 2 divisors, whose sum is σ = 993944388. Its totient is φ = 993944386.

The previous prime is 993944377. The next prime is 993944437. The reversal of 993944387 is 783449399.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 993944387 - 2⁶ = 993944323 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (993944317) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 496972193 + 496972194.

It is an arithmetic number, because the mean of its divisors is an integer number (496972194).

Almost surely, 2^993944387 is an apocalyptic number.

993944387 is a deficient number, since it is larger than the sum of its proper divisors (1).

993944387 is an equidigital number, since it uses as much as digits as its factorization.

993944387 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5878656, while the sum is 56.

The square root of 993944387 is about 31526.8835599080. The cubic root of 993944387 is about 997.9773740759.

The spelling of 993944387 in words is "nine hundred ninety-three million, nine hundred forty-four thousand, three hundred eighty-seven".